Nozzle



June 24, 1930.

c, LAMMERT :1 AL

NOZZLE Filed Jan. 31, 1927 2 Sheets-Sheet l J1me 1930- G. c. LII-\MMERTET AL 1,767,462

NOZZLE Filed Jan. 31, 1927 2 Sheets-Sheet 2 WIIIIIIIIIIIIIIIIIII[220672375 6607 Giczrrzm n Patented June 24, 1930 UNITED STATES" 7 OFFGEORGE c; LAMMERT AND FRANK VB. LAMBERT, on CHICAGO, ILL-rivers NOZZLEApplicationfiledil'anuary -31, 1927 ,Serial No. 164,680. V

Our invention relates to nozzles and more particularly to nozzles forOll burners of the commercial type, such as forboilers, brick kilns andsimilar purposes, one of the principal objects being toprovide anlmproved device of the above character. One of the features. of ourinvention is an improved construction whereby a better alignment andmore positive adjustment of the parts are secured, so as to effect abetter and more .posrtive control of the feed and more perfect andsymmetrical feed and direction of flame.

Another feature of our inventlon is an 1mproved construction whereby asuction s produced at the nozzle end, thereby acting upon the oil beingfed to the nozzle and thus permitting use with low pressure or gravityfeed as Well as with higher pressure, and at the same time giving 311even feed and more perfect performance. V

For a better understanding of our invention reference is to be had tothe accompanying drawings, in Which Fig. 1 is a'longitudinalj sectionalview" through the nozzle; a I Fig. 2 is a vertical cross sectional Viewalong the line 22 of Fig. 1;

Fig. 3 is a detail sectional view of the in-;

arated by an annular rib 12 threaded and shouldered so as to receive theintermediate nozzle bushing B. Threaded inlets 13-514 are provided forthe oil and air chambers,

permit attaching suitable pipes .so as to thereto. l p H Theintermediate nozzle B has a threaded and shouldered end 15 so that itwill posi-; tively' center in the nozzle casing and abut the shoulder ofthe central rib,12 so as-t'o secure perfect alignment of the parts,"This interior threaded portio 18.

nozzle has a tapered 16," the outer surface of which is pr ferablycutatah an le of 11 degrees andhavingfa suitable inner angular surface17 preferahly parallel "with a the outer surface and fktendingback to -the:

A suitable nozzle cap 0 is providedbeihg shouldered and threaded sothatjt may be secured to the end of the cylindrical casing A and iperfect alignment with the etlierv parts. This nezzlecap-(l has tape edi her, passag la preferably cut at an le differing slightly from theangle; of the termediate nozzle so as to provide a gratinally decrea ingtapering passage, as will be seen from Fi 1. We have fouhd that an angleof 12 degrees asijshown in Fig. 21s a'very e'ffective one for theinterior of the cap 0, thus giving a diiferenceof 1 g, degreeshetweenthe ta er-of theta-'0 parts B and-O. Thus a converging taperingpassage is provided for the air as it. is fed tothe nozzle, therebygiving an increased velocity at the nozzle end and at the same timegivin a better and more positive controlfvv'ith a more evenfeed of airthan if a straight passage Were provided of the samec ross sectionalareaas'at thenozz'le'end" of the passage.

'With'the angular construction as referred toabove We finclthat We getagreater throw of the fuel and a better concentration, that is lessspreading of. the fuel and flame than was heretofore secured. Thisisofconsiderable im ortance where the nozzle is used with long boilers orin long brick kilns'.- "Wealso find that'by' roviding'a c'y'lihdricaloutlet 20 for the-nozzl end and 'ofisubstantial length, a'betterandimproved direct ing effect of the fuel or flame is secured, with abetter concentration for the longerflanies'.

In order to support the valve sternajndprovide oil inlet passages to theinterior of the lnterinedlate nozzle,"- We provide an]innerb'ushingjDthreadedatone end 21 so that it" a 1 maybeinserted'into't'he hla'dejd end "18 of the intermediate bushing B, Thebushing, D has a pluralit 'of longit' 'dinal gro v s 22' out into itsouter surface soas to providepas sages or supplyin onto the n zzle-Atapered end 23 is also provi-ded for thebushing D so as to fit againstthe tapered inner wall 17 of bushing B and thereby more posi tivelyalign the parts and secure a better alignment of the valve stem E.

The valve stem E is adjustably supported in a cap 24 having a packingnut 25 threaded over the end so as to prevent leakage of oil. The valvestem E extends through the inner bushing D and has a tapering end 26adapted to seat against the inside of the bushing B. A cylindrical tip27 extends from the end of the valve stem into the cylindrical outlet 28of the intermediate bushing B, so as to secure a ring feed of the oiland have the air or steam more positively act thereon.

In the use of our improved nozzle either air or steam may be supplied tothe inlet 14, although air has been found to be sutficiently effectiveto properlybreak up and atomize the oil as it is fed to the nozzle end20. The

use of air instead ofste am of course reduces to a great extent the costof operation of such nozzles and where a great many of them are used asin largeboiler'banks or brick kilns, the saving amounts to considerable.

Also by the use of an air pressure with our improved nozzle, the oil befed by gravity or at low pressure because of the suction caused by theparticular method of air feed, and we have secured a four pounds suctionon the'oil on thenozzleend by the particular air feed here employed;

It will also be noted that our nnproved nozzle is readily cleaned bysimply opening the valve far enough to blow out any sedimerit that maycollect, such wide opening of the valve increasing the suction at thenozzle end to assist in drawing out such sediment. By the provision ofthis self-cleaning feature we avoid the use of a. screen for the oil,

which is often undesirable,

, What we claim as new and desire to secure by United States LettersPatent is 1. In an'oil burner nozzle of thecharacterdescribed, a casinghaving air and oil annular chambers thereinjseparated by an annular rib,a: bushing threaded into said rib and having an outside and insidetapered nozzle, extending toward the nozzle end of the casing, theinside end opening of said nozzle being of cylindrical cross section, anozzle cap at the end of the casing having a tapered interior fitting'over the tapered.

bushing, the tapered interior of the cap and tapered exterior of thebushing extending at anglesconverging toward the nozzle end so astoprovide a gradually decreasing tapering passage toward the nozzle end,and an adjustable valve stem provided with a taper adapted to cooperatewith the inside taper of the tapered nozzle, and a cylindrical tipadapted to extend into the cylindrical passageway at theend of saidnozzle and project slightly beyond the same so as to prov de a ring feedfor the oil.

2. An oil burner nozzle as defined in claim 1 wherein said nozzle capprojects considerably beyond the oil and air passageways in the form ofa cylindrical opening, whereby a mixing takes place before emergencefrom the nozzle, and the character of the emergence is such that it maybe directed in a narrow straight line of relatively high velocity.

3. In an oil burner system, a casing having air and oil annular chamberstherein separated by an annular rib, a bushing threaded into said riband having a-tapered nozzle end extending toward a nozzle end of thecasing, an inner bushing threaded into said first mentioned bushing andhaving passageways therein extending between the annular oil chamber andtheinterior of said tapered nozzle, an adjustable valve stem with aconical. end engaging the interior tapered surface of saidtaperedbushing and centered by'said second bushing, a cylindricalprojection on thecnd. ofthe valve stem projecting slightly beyond saidtapered bushing, said bushing having its end inner side walls concentricwith said, cylindrical projection so that an annular passageway ofrelatively great length is provided outwardly from the conical portionofthe valve stem, and a nozzle cap at the end of the casing having atapered interior fitting over the tapered bushing to provide anannularair passage between said cap and said tapered bushing whereby aring feed of both air and oil is obtained.

4. The nozzle defined in claim 3 wherein the tapered interior of the capand the tapered exterior of the bushing extend at angles convergingtoward the nozzle end so as to provide a gradually decreasing taperingpassage toward the nozzle end.

5. A nozzle as defined in claim 3 wherein said cap projects considerablybeyond the air and oil passageways to provide a cylindrical mixingchamber and assist in directing the Combustible mixture in a narrowstraightline.

6. A nozzle as defined in claim 3 ,wherein the tapered interior of thecap and the tapered exterior of the bushing extend in angles convergingtoward the nozzle end so as to provide a gradually decreasing taperingpassage toward the nozzle end. and wherein said cap projectsconsiderably beyond the air and oil passageways to provide a cylindricalmixing chamber and assist in directing the combustible mixture in anarrow straight line. 7

7 In an oil burner nozzle a cylindrical casing having an inner annularthreaded rib forming a partition substantially midway between the endsof the cylinder and-having air and oil inlet passageways communicatingwith the interior of the cylinder at each side of the rib, the ends ofthe cylinder being also provided with threads, a shouldered threadedbushing secured in the threaded rib and having an interior and exteriortaper in a direction away fro-1n the rib, the inner surface of thenozzle bushing being shaped at its end to form a small cylinden a nozzletip threaded onto one end of the cylinder shaped to have an innertapered surface of the general character of the outer nozzle taper andto complete the closing off of the air chamber exceptas con nected withthe annular tapered opening between the nozzle bushing and nozzle tip,the inner surface of the nozzle tip also being shaped to form a'cylindrical openingiinlne diately in advance ofthe discharge end of thenozzle bushing, a cap secured to the other end of the cylinder tocomplete-the closing off of the oil chamber, an inner bushing thread edinto the nozzle bushing and having longitudinal oil passageways therein,and a valve stein threaded into the cap and journaled in the cap and insaidinnerbushing, the end of the stem being tapered to seat the nozzlebushing and having a tip of cylindrical cross section extending into thecylindricalopenwing in the tip of the nozzle bushing the two parts beingso proportioned that the cylindrical tip is never suflicient-lyWithdrawn to prevent the oil feeding in ring shape. 7 In Witnesswhereof, We hereunto subscribe our names this 30th day of December,1926.

GEORGE C. LAMMERT. FRANK B. LAMBERT.

